5.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:P/A:P
7.4 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
7.3 High
AI Score
Confidence
High
0.005 Low
EPSS
Percentile
76.2%
The remote Debian 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-2822 advisory.
In NetKit through 0.17, rcp.c in the rcp client allows remote rsh servers to bypass intended access restrictions via the filename of . or an empty filename. The impact is modifying the permissions of the target directory on the client side. This is similar to CVE-2018-20685. (CVE-2019-7282)
An issue was discovered in rcp in NetKit through 0.17. For an rcp operation, the server chooses which files/directories are sent to the client. However, the rcp client only performs cursory validation of the object name returned. A malicious rsh server (or Man-in-The-Middle attacker) can overwrite arbitrary files in a directory on the rcp client machine. This is similar to CVE-2019-6111. (CVE-2019-7283)
Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dla-2822. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(155622);
script_version("1.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/23");
script_cve_id("CVE-2019-7282", "CVE-2019-7283");
script_name(english:"Debian DLA-2822-1 : netkit-rsh - LTS security update");
script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing one or more security-related updates.");
script_set_attribute(attribute:"description", value:
"The remote Debian 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dla-2822 advisory.
- In NetKit through 0.17, rcp.c in the rcp client allows remote rsh servers to bypass intended access
restrictions via the filename of . or an empty filename. The impact is modifying the permissions of the
target directory on the client side. This is similar to CVE-2018-20685. (CVE-2019-7282)
- An issue was discovered in rcp in NetKit through 0.17. For an rcp operation, the server chooses which
files/directories are sent to the client. However, the rcp client only performs cursory validation of the
object name returned. A malicious rsh server (or Man-in-The-Middle attacker) can overwrite arbitrary files
in a directory on the rcp client machine. This is similar to CVE-2019-6111. (CVE-2019-7283)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/netkit-rsh");
script_set_attribute(attribute:"see_also", value:"https://www.debian.org/lts/security/2021/dla-2822");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2019-7282");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2019-7283");
script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/stretch/netkit-rsh");
script_set_attribute(attribute:"solution", value:
"Upgrade the netkit-rsh packages.
For Debian 9 stretch, these problems have been fixed in version 0.17-17+deb9u1.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-7283");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2019/01/31");
script_set_attribute(attribute:"patch_publication_date", value:"2021/11/18");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/11/19");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:rsh-client");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:rsh-server");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Debian Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2021-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");
exit(0);
}
include('audit.inc');
include('debian_package.inc');
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);
var release = get_kb_item('Host/Debian/release');
if ( isnull(release) ) audit(AUDIT_OS_NOT, 'Debian');
var release = chomp(release);
if (! preg(pattern:"^(9)\.[0-9]+", string:release)) audit(AUDIT_OS_NOT, 'Debian 9.0', 'Debian ' + release);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Debian', cpu);
var pkgs = [
{'release': '9.0', 'prefix': 'rsh-client', 'reference': '0.17-17+deb9u1'},
{'release': '9.0', 'prefix': 'rsh-server', 'reference': '0.17-17+deb9u1'}
];
var flag = 0;
foreach package_array ( pkgs ) {
var release = NULL;
var prefix = NULL;
var reference = NULL;
if (!empty_or_null(package_array['release'])) release = package_array['release'];
if (!empty_or_null(package_array['prefix'])) prefix = package_array['prefix'];
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (release && prefix && reference) {
if (deb_check(release:release, prefix:prefix, reference:reference)) flag++;
}
}
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : deb_report_get()
);
exit(0);
}
else
{
var tested = deb_pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'rsh-client / rsh-server');
}
Vendor | Product | Version | CPE |
---|---|---|---|
debian | debian_linux | rsh-client | p-cpe:/a:debian:debian_linux:rsh-client |
debian | debian_linux | rsh-server | p-cpe:/a:debian:debian_linux:rsh-server |
debian | debian_linux | 9.0 | cpe:/o:debian:debian_linux:9.0 |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-7282
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-7283
packages.debian.org/source/stretch/netkit-rsh
security-tracker.debian.org/tracker/CVE-2019-7282
security-tracker.debian.org/tracker/CVE-2019-7283
security-tracker.debian.org/tracker/source-package/netkit-rsh
www.debian.org/lts/security/2021/dla-2822
5.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:P/A:P
7.4 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
7.3 High
AI Score
Confidence
High
0.005 Low
EPSS
Percentile
76.2%